CA2847956A1 - Tap changer - Google Patents
Tap changer Download PDFInfo
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- CA2847956A1 CA2847956A1 CA2847956A CA2847956A CA2847956A1 CA 2847956 A1 CA2847956 A1 CA 2847956A1 CA 2847956 A CA2847956 A CA 2847956A CA 2847956 A CA2847956 A CA 2847956A CA 2847956 A1 CA2847956 A1 CA 2847956A1
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- Prior art keywords
- semiconductor switching
- tap changer
- winding
- switching units
- sub
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- Abandoned
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- 238000004804 winding Methods 0.000 claims abstract description 71
- 239000004065 semiconductor Substances 0.000 claims abstract description 60
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 239000000654 additive Substances 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
- H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC
- H02M5/04—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters
- H02M5/10—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using transformers
- H02M5/12—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using transformers for conversion of voltage or current amplitude only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC
- H02M5/04—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters
- H02M5/22—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/25—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/257—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Ac-Ac Conversion (AREA)
- Power Conversion In General (AREA)
- Electronic Switches (AREA)
Abstract
The invention relates to a tap changer for voltage regulation, comprising semiconductor switch units (S1.1,..., S1.6; S2.1,..., S2.6) on a variable transformer having a regulating winding, wherein two parallel load branches (1, 2) are provided, in each of which several series-connected semiconductor switch units are arranged. Parts of the regulating winding (W1, W2, W3) and bridges (B1, B2) are provided alternately and run parallel between the two load branches, alternating such that by corresponding connection of the semiconductor switch units in both load branches, the parts of the regulating wiring can be operated arbitrarily in a subtractive and/or additive manner.
Description
TAP CHANGER
The invention relates to a tap changer for voltage regulation with semiconductor switching elements.
DE 22 48 166 [US 4,220,911] already describes a regulable transformer with semiconductor switching elements. In that case, the secondary winding consists of a specific number of regulating winding parts that are combined into a defined number of winding groups connected in series, wherein each winding group contains two or three regulating winding parts connected in parallel. In that case, each regulating winding part is provided with a contactless switching element. Also described in this specification is another variant, in which the secondary winding of the transformer consists of a group of regulating winding parts connected in series, wherein each regulating winding part contains four contactless switching elements. The arrangement is designed in such a manner that the direction of the voltage at the terminals of the regulating winding part is reversible and also the entire regulating winding part can be selectably bridged over.
A further device for stepped switching of the secondary voltage of a transformer is known from DE 25 08 013 [US 3,973,395].
In this regard as well the secondary winding is grouped into sub-windings, wherein semiconductor switching elements for switching over can similarly be provided.
DE 197 47 712 describes an arrangement of a tap changer of similar kind to a tapped transformer constructed as an autotransformer. In that regard, individual winding parts that are connectable individually and independently of one another are similarly provided. Apart from fixed taps of the regulating winding, in this arrangement separate winding parts can be additionally switched on or connected.
Different forms of embodiment of a further tap changer for uninterrupted load changeover are known from WO 95/27931 [US
5,604,423], where thyristors similarly serve as switching elements.
In that case, different winding parts of a tap winding as part of the secondary winding of the respective tapped transformer can be connected or disconnected by means of thyristor pairs in anti-parallel connection. In addition, for realization of a voltage regulation that is as finely stepped as possible, with a limited number of winding taps there is proposed in this specification a method that is termed "discrete circle modulation" and in which the thyristors are controlled in such a manner that intermediate values of the secondary voltage result.
In the solutions known from the prior art semiconductor switching elements de facto take over the function of the mechanical selector arm in classic mechanical tap changers.
Individual winding taps of the regulating windings can themselves be connected or disconnected by means of the semiconductor switching elements. It is also possible to subdivide the regulating winding into sub-windings that can be separately connected.
The high level of circuit complication and the necessary special adaptation of the semiconductor switching elements are disadvantageous in this prior art.
A further disadvantage of the prior art is that regulation is no longer possible or at least adequate regulation is no longer possible in the event of failure of individual semiconductor switching elements.
It is object of the invention to indicate a tap changer with semiconductor switching elements that is of simple construction. In addition, it shall have a modular, expandable construction. Finally, the tap changer according to the invention shall have a high level of regulating reliability and accuracy even in the case of failure of individual switching elements, quasi as emergency operation.
This object is fulfilled by a tap changer with the features of the first claim. The subclaims relate to particularly advantageous developments of the invention.
The general inventive idea consists in constructing the tap changer in modular manner and selectively connecting and connecting in opposition different sub-windings of the regulating winding.
The tap changer according to the invention comprises two parallel switching branches that each comprise semiconductor switching units connected in series. The individual semiconductor switching units of the first load branch and the individual semiconductor switching units of the second load branch respectively lie opposite one another in pairs. Electrical sub-windings of the regulating winding are provided in parallel between the two load branches, in each instance between two semiconductor switching units of each load branch. The electrical sub-windings are respectively magnetically coupled with the regulating winding, i.e. mounted on the respective transformer arm.
The electrical sub-windings can be connected or connected in opposition as desired by the respective switching states of the semiconductor switching units in the two load branches.
With particular advantage the electrical sub-windings are differently dimensioned. If a first sub-winding has a specific number of windings, the other electrical subwindings have winding numbers that represent a multiple.
It is possible within the scope of the invention to vary 3o the number of the individual semiconductor switching units as well as the electrical sub-windings that in total form the tap changer according to the invention.
In the case of the tap changer according to the invention a large number of voltage steps is achievable with only a few components for selective connecting or connecting in opposition of the individual sub-windings. Moreover, in the tap changer according to the invention a redundant generation of individual sub-voltages is possible; in the case of failure - which can never be excluded in practice - of individual switching elements the lo regulation can nevertheless be substantially continued.
The invention shall be explained in more detail in the following by way of example on the basis of drawings, in which:
FIG. 1 shows a first form of embodiment of a tap changer according to the invention, FIG. 2 shows a first semiconductor switching unit, FIG. 3 shows a second semiconductor switching unit, FIG. 4 shows a third semiconductor switching unit, FIG. 5 shows a second form of embodiment of a tap changer according to the invention, FIG. 6 shows a special dimensioning of the tap changer shown in FIG. 1 and FIG. 7 shows a special dimensioning of the tap changer shown in FIG. 5.
FIG. 1 shows a first tap changer according to the invention. The tap changer shown here is arranged between the fixed, unregulated part of the regulating winding above the terminal R and the load diverter LA. It has two parallel load branches 1 and 2. Semiconductor switching units S1.1 to S1.6 are provided in the first load branch 1 in series connection. Further semiconductor switching units S2.1 to S2.6 are provided in the second load branch 2 similarly in series connection. In that case a respective semiconductor switching unit of the first load branch 1 and semiconductor switching unit of the second load branch 2 are opposite one another in pairs, namely the semiconductor switching units S1.1 and S2.1, S1.2 and S2.2, etc., to 51.6 and S2.6.
Respective sub-windings Wl, W2, W3 of the regulating winding and electrical bridges Bl, B2, B3 are connected in parallel between the two load branches 1 and 2 respectively in alternation between these semiconductor switching units S1.1 and S2.1, S1.2 and S2.2, etc., to S1.6 and S2.6 opposite one another in pairs. In FIG. 1 it is lo shown that a first sub-winding W1 is connected between the semiconductor switching units S1.1 and S2.1 on the one hand and S1.2 and S2.2 on the other hand, a first electrical bridge B1 is connected between the semiconductor switching units S1.2 and S2.2 on the one hand and S1.3 and S2.3 on the other hand, a second sub-winding W2 is connected between the semiconductor switching units S1.3 and S2.3 on the one hand and S1.4 and S2.4 on the other hand, etc.
FIG. 2 shows a semiconductor switching unit that has, as semiconductor switch, a thyristor pair S in anti-parallel connection.
FIG. 3 shows a further semiconductor switching unit that has a series connection of two individual semiconductor switches Sa and Sb.
FIG. 4 shows a further semiconductor switching unit that has a series connection of four individual semiconductor switches Sa to Sd.
The individual semiconductor switches are here illustrated, by way of example, as thyristor pairs in anti-parallel connection; other known semiconductor switches, for example IGBTs, are also possible within the scope of the invention.
The invention relates to a tap changer for voltage regulation with semiconductor switching elements.
DE 22 48 166 [US 4,220,911] already describes a regulable transformer with semiconductor switching elements. In that case, the secondary winding consists of a specific number of regulating winding parts that are combined into a defined number of winding groups connected in series, wherein each winding group contains two or three regulating winding parts connected in parallel. In that case, each regulating winding part is provided with a contactless switching element. Also described in this specification is another variant, in which the secondary winding of the transformer consists of a group of regulating winding parts connected in series, wherein each regulating winding part contains four contactless switching elements. The arrangement is designed in such a manner that the direction of the voltage at the terminals of the regulating winding part is reversible and also the entire regulating winding part can be selectably bridged over.
A further device for stepped switching of the secondary voltage of a transformer is known from DE 25 08 013 [US 3,973,395].
In this regard as well the secondary winding is grouped into sub-windings, wherein semiconductor switching elements for switching over can similarly be provided.
DE 197 47 712 describes an arrangement of a tap changer of similar kind to a tapped transformer constructed as an autotransformer. In that regard, individual winding parts that are connectable individually and independently of one another are similarly provided. Apart from fixed taps of the regulating winding, in this arrangement separate winding parts can be additionally switched on or connected.
Different forms of embodiment of a further tap changer for uninterrupted load changeover are known from WO 95/27931 [US
5,604,423], where thyristors similarly serve as switching elements.
In that case, different winding parts of a tap winding as part of the secondary winding of the respective tapped transformer can be connected or disconnected by means of thyristor pairs in anti-parallel connection. In addition, for realization of a voltage regulation that is as finely stepped as possible, with a limited number of winding taps there is proposed in this specification a method that is termed "discrete circle modulation" and in which the thyristors are controlled in such a manner that intermediate values of the secondary voltage result.
In the solutions known from the prior art semiconductor switching elements de facto take over the function of the mechanical selector arm in classic mechanical tap changers.
Individual winding taps of the regulating windings can themselves be connected or disconnected by means of the semiconductor switching elements. It is also possible to subdivide the regulating winding into sub-windings that can be separately connected.
The high level of circuit complication and the necessary special adaptation of the semiconductor switching elements are disadvantageous in this prior art.
A further disadvantage of the prior art is that regulation is no longer possible or at least adequate regulation is no longer possible in the event of failure of individual semiconductor switching elements.
It is object of the invention to indicate a tap changer with semiconductor switching elements that is of simple construction. In addition, it shall have a modular, expandable construction. Finally, the tap changer according to the invention shall have a high level of regulating reliability and accuracy even in the case of failure of individual switching elements, quasi as emergency operation.
This object is fulfilled by a tap changer with the features of the first claim. The subclaims relate to particularly advantageous developments of the invention.
The general inventive idea consists in constructing the tap changer in modular manner and selectively connecting and connecting in opposition different sub-windings of the regulating winding.
The tap changer according to the invention comprises two parallel switching branches that each comprise semiconductor switching units connected in series. The individual semiconductor switching units of the first load branch and the individual semiconductor switching units of the second load branch respectively lie opposite one another in pairs. Electrical sub-windings of the regulating winding are provided in parallel between the two load branches, in each instance between two semiconductor switching units of each load branch. The electrical sub-windings are respectively magnetically coupled with the regulating winding, i.e. mounted on the respective transformer arm.
The electrical sub-windings can be connected or connected in opposition as desired by the respective switching states of the semiconductor switching units in the two load branches.
With particular advantage the electrical sub-windings are differently dimensioned. If a first sub-winding has a specific number of windings, the other electrical subwindings have winding numbers that represent a multiple.
It is possible within the scope of the invention to vary 3o the number of the individual semiconductor switching units as well as the electrical sub-windings that in total form the tap changer according to the invention.
In the case of the tap changer according to the invention a large number of voltage steps is achievable with only a few components for selective connecting or connecting in opposition of the individual sub-windings. Moreover, in the tap changer according to the invention a redundant generation of individual sub-voltages is possible; in the case of failure - which can never be excluded in practice - of individual switching elements the lo regulation can nevertheless be substantially continued.
The invention shall be explained in more detail in the following by way of example on the basis of drawings, in which:
FIG. 1 shows a first form of embodiment of a tap changer according to the invention, FIG. 2 shows a first semiconductor switching unit, FIG. 3 shows a second semiconductor switching unit, FIG. 4 shows a third semiconductor switching unit, FIG. 5 shows a second form of embodiment of a tap changer according to the invention, FIG. 6 shows a special dimensioning of the tap changer shown in FIG. 1 and FIG. 7 shows a special dimensioning of the tap changer shown in FIG. 5.
FIG. 1 shows a first tap changer according to the invention. The tap changer shown here is arranged between the fixed, unregulated part of the regulating winding above the terminal R and the load diverter LA. It has two parallel load branches 1 and 2. Semiconductor switching units S1.1 to S1.6 are provided in the first load branch 1 in series connection. Further semiconductor switching units S2.1 to S2.6 are provided in the second load branch 2 similarly in series connection. In that case a respective semiconductor switching unit of the first load branch 1 and semiconductor switching unit of the second load branch 2 are opposite one another in pairs, namely the semiconductor switching units S1.1 and S2.1, S1.2 and S2.2, etc., to 51.6 and S2.6.
Respective sub-windings Wl, W2, W3 of the regulating winding and electrical bridges Bl, B2, B3 are connected in parallel between the two load branches 1 and 2 respectively in alternation between these semiconductor switching units S1.1 and S2.1, S1.2 and S2.2, etc., to S1.6 and S2.6 opposite one another in pairs. In FIG. 1 it is lo shown that a first sub-winding W1 is connected between the semiconductor switching units S1.1 and S2.1 on the one hand and S1.2 and S2.2 on the other hand, a first electrical bridge B1 is connected between the semiconductor switching units S1.2 and S2.2 on the one hand and S1.3 and S2.3 on the other hand, a second sub-winding W2 is connected between the semiconductor switching units S1.3 and S2.3 on the one hand and S1.4 and S2.4 on the other hand, etc.
FIG. 2 shows a semiconductor switching unit that has, as semiconductor switch, a thyristor pair S in anti-parallel connection.
FIG. 3 shows a further semiconductor switching unit that has a series connection of two individual semiconductor switches Sa and Sb.
FIG. 4 shows a further semiconductor switching unit that has a series connection of four individual semiconductor switches Sa to Sd.
The individual semiconductor switches are here illustrated, by way of example, as thyristor pairs in anti-parallel connection; other known semiconductor switches, for example IGBTs, are also possible within the scope of the invention.
FIG. 5 shows a second form of embodiment of a tap changer according to the invention. In that case, a special switching subassembly FS is provided, comprising four special semiconductor switching units S1.7 and in series S1.8 in the first load branch 1 and S2.7 and in series therewith S2.8 in the second load branch 2, between which the one sub-winding W3 is arranged in parallel as described above. These special semiconductor switching units S1.7, S1.8, S2.7 and S2.8 are IGBTs that can be controlled by pulse width modulation (PWM) and thus allow a finely stepped switching-on and lo switching-off of the sub-winding W3. In this form of embodiment of the invention the sub-windings W1 and W2 are connected and connected in opposition as desired according to the respective switching state of the semiconductor switching units Si.]. to S1.4 and S2.1 to S2.4. The sub-winding W3 can be appropriately added or subtracted in any number of its parts that overall enables a particularly fine regulation without stepping.
FIG. 6 shows the tap changer of FIG. 1 with a particularly advantageous dimensioning. The position of the individual components corresponds with the illustration in FIG. 1, for which reason reference numerals were dispensed with for the sake of clarity. It is shown here that the first sub-winding W1 has nine times the winding number of the third sub-winding W3; the second sub-winding W2 has three times the winding number of the third sub-winding W3. In total 27 voltage steps can thus be produced in the illustrated example by selective connecting and disconnecting of the three sub-windings W1 to W3.
For example, the center setting '0 is obtained with the tap changer according to the invention in that the semi-conductor switching units S1.1 to S1.6 are closed, whereas the semiconductor switching units S2.1 to S2.6 are opened. In redundant manner, the semiconductor switching units S1.1 to S1.6 can also be opened and the semiconductor switching units S2.1 to S2.6 closed. It can be seen that this setting, but not only this, can be produced in redundant manner.
In the case of the setting '13 in which all sub-windings W1 to W3 are connected in the same sense, by way of example the following settings of the semiconductor switching units arise: S.1 closed, S1.2 open, S1.3 closed, S1.4 open, S1.5 closed, S1.6 open;
S2.1 open, S2.2 closed, S2.3 open, S2.4 closed, S2.5 open, S2.6 closed. All other settings of the tap changer according to the io invention, i.e. voltage steps, can be produced in entirely analogous manner.
In order to manage the corresponding switching outputs it can be advantageous to provide the individual semiconductor switching units respectively as a series connection of several separate semiconductor switches, as is shown, by way of example, in FIGS. 3 and 4.
FIG. 7 shows the tap changer of FIG. 5 with a similarly particularly advantageous dimensioning. The position of the individual components again corresponds with the illustration in FIG. 5, for which reason reference numerals were also dispensed with here for the sake of clarity. It is shown here that the first sub-winding W1 has nine times the winding number of third sub-winding W3; the second sub-winding W2 has twice the winding number of the third sub-winding W3. A finely stepped regulation is possible by selective connection and connection in opposition of the two sub-windings W1 and W2 and switching of the sub-winding W3 rapidly in terms of time. In order to manage the corresponding switching voltages, it can also be advantageous here to provide the semiconductor switching units respectively as a series connection of several separate semiconductor switches, as is shown, by way of example, in FIGS. 3 and 4.
FIG. 6 shows the tap changer of FIG. 1 with a particularly advantageous dimensioning. The position of the individual components corresponds with the illustration in FIG. 1, for which reason reference numerals were dispensed with for the sake of clarity. It is shown here that the first sub-winding W1 has nine times the winding number of the third sub-winding W3; the second sub-winding W2 has three times the winding number of the third sub-winding W3. In total 27 voltage steps can thus be produced in the illustrated example by selective connecting and disconnecting of the three sub-windings W1 to W3.
For example, the center setting '0 is obtained with the tap changer according to the invention in that the semi-conductor switching units S1.1 to S1.6 are closed, whereas the semiconductor switching units S2.1 to S2.6 are opened. In redundant manner, the semiconductor switching units S1.1 to S1.6 can also be opened and the semiconductor switching units S2.1 to S2.6 closed. It can be seen that this setting, but not only this, can be produced in redundant manner.
In the case of the setting '13 in which all sub-windings W1 to W3 are connected in the same sense, by way of example the following settings of the semiconductor switching units arise: S.1 closed, S1.2 open, S1.3 closed, S1.4 open, S1.5 closed, S1.6 open;
S2.1 open, S2.2 closed, S2.3 open, S2.4 closed, S2.5 open, S2.6 closed. All other settings of the tap changer according to the io invention, i.e. voltage steps, can be produced in entirely analogous manner.
In order to manage the corresponding switching outputs it can be advantageous to provide the individual semiconductor switching units respectively as a series connection of several separate semiconductor switches, as is shown, by way of example, in FIGS. 3 and 4.
FIG. 7 shows the tap changer of FIG. 5 with a similarly particularly advantageous dimensioning. The position of the individual components again corresponds with the illustration in FIG. 5, for which reason reference numerals were also dispensed with here for the sake of clarity. It is shown here that the first sub-winding W1 has nine times the winding number of third sub-winding W3; the second sub-winding W2 has twice the winding number of the third sub-winding W3. A finely stepped regulation is possible by selective connection and connection in opposition of the two sub-windings W1 and W2 and switching of the sub-winding W3 rapidly in terms of time. In order to manage the corresponding switching voltages, it can also be advantageous here to provide the semiconductor switching units respectively as a series connection of several separate semiconductor switches, as is shown, by way of example, in FIGS. 3 and 4.
Other dimensions of the sub-windings W1 to W3, as also the semiconductor switching units S1.1 to S2.8, are also possible within the scope of the invention.
Claims (5)
1. A tap changer for voltage regulation with semiconductor switching units at a regulating transformer with a regulating winding, wherein the tap changer is arranged between a fixed, unregulated part of the regulating winding and a load diverter (LA), the tap changer has two parallel load branches (1, 2), semiconductor switching units (S1.1 to S1.6) are provided in series connection in the first load branch (1), further semiconductor switching units (S2.1 to S2.6) are provided similarly in series connection in the second load branch (2) in such a manner that a respective semiconductor switching unit of the first load branch (1) and semiconductor switching unit of the second load branch (2) are opposite one another as a pair and respective sub-windings (W1, W2, W3) of the regulating winding and electrical bridges (81, B2, B3) are connected in parallel between the two load branches (1, 2) respectively in alternation between the semiconductor switching units (S1.1, S2.1;
S1.2, S2.2 to S1.6, S2.6) opposite one another in pairs.
S1.2, S2.2 to S1.6, S2.6) opposite one another in pairs.
2. The tap changer according to claim 1, characterized in that the sub-windings (W1, W2, W3) have different winding numbers.
3. The tap changer according to claim 1 or 2, characterized in that the individual semiconductor switching units (S1.1 to S2.6) consist of thyristor pairs in anti-parallel connection.
4. The tap changer according to any one of claims 1 to 3, characterized in that at least one of the semiconductor switching units (S1.1 to S2.6) consists of a series connection of two or more individual semiconductor switches.
5. The tap changer according to any one of claims 1 to 4, characterized in that at least one of the semiconductor switching units (S1.7, S1.8; S2.7, S2.8) is controllable by a pulse width modulation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011012080.7 | 2011-02-23 | ||
| DE102011012080A DE102011012080A1 (en) | 2011-02-23 | 2011-02-23 | step switch |
| PCT/EP2012/051962 WO2012113641A2 (en) | 2011-02-23 | 2012-02-06 | Tap changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2847956A1 true CA2847956A1 (en) | 2012-08-30 |
Family
ID=45569650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2847956A Abandoned CA2847956A1 (en) | 2011-02-23 | 2012-02-06 | Tap changer |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US20140354390A1 (en) |
| EP (1) | EP2678874A2 (en) |
| JP (1) | JP2014506733A (en) |
| KR (1) | KR20140004178A (en) |
| CN (1) | CN103534768A (en) |
| AU (1) | AU2012219902A1 (en) |
| BR (1) | BR112013018587A2 (en) |
| CA (1) | CA2847956A1 (en) |
| DE (1) | DE102011012080A1 (en) |
| RU (1) | RU2013142935A (en) |
| WO (1) | WO2012113641A2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012108363A1 (en) * | 2012-09-07 | 2014-06-12 | Aeg Power Solutions Gmbh | Method of changing sine voltage to rated voltage in single phase power supply, involves changing voltage between outer and neutral conductors and closing or opening a switch during successive periodic cycles to modulate induced voltage |
| DE102013101652A1 (en) | 2013-02-20 | 2014-08-21 | Maschinenfabrik Reinhausen Gmbh | On-load tap-changer with semiconductor switching elements and method for operating an on-load tap-changer |
| DE102014106322B4 (en) | 2014-05-06 | 2017-02-09 | Maschinenfabrik Reinhausen Gmbh | Plant and method for providing reactive power |
| DE102014012266B4 (en) | 2014-08-22 | 2024-10-02 | Maschinenfabrik Reinhausen Gmbh | Switching arrangement with two on-load tap-changers, electrical system with such a switching arrangement and its use |
| EP3839993A1 (en) * | 2019-12-17 | 2021-06-23 | ABB Power Grids Switzerland AG | Power electronics on-load tap changer with a reduced number of taps |
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| US3700925A (en) * | 1971-03-29 | 1972-10-24 | Westinghouse Electric Corp | Thyristor tap changer for electrical inductive apparatus |
| FR2155839B1 (en) | 1971-10-08 | 1975-04-18 | Alsthom Cgee | |
| IT1010601B (en) | 1974-03-11 | 1977-01-20 | Legnaioli L | ELECTRIC MACHINE TO CHANGE THE TRANSFORMATION RATIO OF A VOLTAGE WITH THE AID OF SWITCHES |
| US4220911A (en) * | 1978-09-08 | 1980-09-02 | Westinghouse Electric Corp. | Thyristor tap changer for electrical inductive apparatus |
| EP0764296A4 (en) * | 1994-04-06 | 1998-06-17 | Utility Systems Technologies I | Load tap changer |
| JPH07335455A (en) * | 1994-06-09 | 1995-12-22 | Fuji Electric Co Ltd | Stationary load tap changer and its tap change method |
| NL1000914C2 (en) * | 1995-08-01 | 1997-02-04 | Geb Zuid Holland West Nv | Method and device for continuous adjustment and control of a transformer conversion ratio, as well as a transformer provided with such a device. |
| DE19747712C2 (en) | 1997-10-29 | 2000-09-07 | Reinhausen Maschf Scheubeck | Arrangement of a tap changer on a tap transformer |
| AT411938B (en) * | 1999-11-02 | 2004-07-26 | Hansjoerg Dipl Ing Dr Hauer | METHOD AND DEVICE FOR REGULATING THE ELECTRICAL VOLTAGE IN ELECTRICAL SUPPLY NETWORKS AND / OR CONSUMER SYSTEMS |
| WO2002015362A1 (en) * | 2000-08-18 | 2002-02-21 | John Vithayathil | Circuit arrangement for the static generation of a variable electric output |
| US6335613B1 (en) * | 2000-12-04 | 2002-01-01 | Abb T&D Technology Ltd. | Versatile power flow transformers for compensating power flow in a transmission line |
| DE10102310C1 (en) * | 2001-01-18 | 2002-06-20 | Reinhausen Maschf Scheubeck | Thyristor stepping switch for stepping transformer has hybrid construction with mechanical stepping switch and thyristor load switching device in separate housing |
| FR2873489B1 (en) * | 2004-07-20 | 2006-10-06 | Areva T & D Sa | TRANSFORMER SHIFT SYSTEM IN CHARGE |
| ATE535921T1 (en) * | 2008-08-27 | 2011-12-15 | Reinhausen Maschf Scheubeck | TAP SWITCH WITH SEMICONDUCTOR SWITCHING ELEMENTS |
| DE102010008978B4 (en) * | 2010-02-24 | 2012-10-04 | Rainer Marquardt | Circuit arrangement for modular drive converter |
| DE102011108920B4 (en) * | 2011-07-29 | 2013-04-11 | Technische Universität München | Electric drive system |
-
2011
- 2011-02-23 DE DE102011012080A patent/DE102011012080A1/en not_active Withdrawn
-
2012
- 2012-02-06 US US13/978,810 patent/US20140354390A1/en not_active Abandoned
- 2012-02-06 EP EP12703094.8A patent/EP2678874A2/en not_active Withdrawn
- 2012-02-06 CA CA2847956A patent/CA2847956A1/en not_active Abandoned
- 2012-02-06 CN CN201280009902.0A patent/CN103534768A/en active Pending
- 2012-02-06 WO PCT/EP2012/051962 patent/WO2012113641A2/en active Application Filing
- 2012-02-06 RU RU2013142935/07A patent/RU2013142935A/en not_active Application Discontinuation
- 2012-02-06 JP JP2013554838A patent/JP2014506733A/en active Pending
- 2012-02-06 AU AU2012219902A patent/AU2012219902A1/en not_active Abandoned
- 2012-02-06 KR KR1020137021622A patent/KR20140004178A/en not_active Application Discontinuation
- 2012-02-06 BR BR112013018587A patent/BR112013018587A2/en not_active IP Right Cessation
Also Published As
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|---|---|
| KR20140004178A (en) | 2014-01-10 |
| CN103534768A (en) | 2014-01-22 |
| JP2014506733A (en) | 2014-03-17 |
| WO2012113641A2 (en) | 2012-08-30 |
| AU2012219902A1 (en) | 2013-09-19 |
| WO2012113641A3 (en) | 2012-12-20 |
| RU2013142935A (en) | 2015-04-10 |
| DE102011012080A1 (en) | 2012-08-23 |
| US20140354390A1 (en) | 2014-12-04 |
| BR112013018587A2 (en) | 2016-09-27 |
| EP2678874A2 (en) | 2014-01-01 |
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| Date | Code | Title | Description |
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| FZDE | Discontinued |
Effective date: 20160208 |